1.Dear Zachary: A Letter to a Son About His Father

MSNBC Films

"This was one of the first documentaries I fell in love with, it’s such an incredibly heartbreaking story. The less you know about the plot the better your experience will be, but it’s about a filmmaker who makes a movie about his childhood best friend who dies tragically. Can’t. Recommend. Enough."

2.The Fear of 13

Dogwoof

"It’s about a man, Nick Yarris, who has been on death row for 21 years and he tells his story of what happened. Yarris is very articulate and honest with his story and you start to feel for him. To me, it’s more emotional and raw than a typical crime documentary and the end will leave you shocked."

4.13th

Netflix

"13th on Netflix truly changed the way I look at the world. I had taken sociology courses and was generally aware of the cycle of poverty and incarceration faced by the black community, but it never really hit home until I watched this doc. It’s interesting and dynamic and you’re going to learn so much about what goes on around you every day."

6.Amanda Knox

Netflix

"As a person who never watches documentaries, the Amanda Knox documentary on Netflix is absolutely incredible. It gave me an in depth look at the crime and still left me baffled and hungry to know more."

7.The Jinx - The Life and Deaths of Robert Durst

HBO

"If you think Making a Murderer left you speechless you haven’t seen anything! I can’t say much about it without ruining it, but Bob Durst is the heir to a multimillion pound fortune who’s first wife went missing in the '70s...and boy does it get good."

8.Miss Representation

Girls' Club Entertainment

"It's informative, emotional, inspiring and very entertaining! Great mix of commentary, infographics and personal storytelling. It really gets you thinking on how women are treated and portrayed. Not just a documentary for women, but really a great watch for everyone."

9.The White Helmets

Netflix

"It follows the men who risk their lives as first responders to the bombings in Syria. Their dedication, service, and sacrifice in the face of such horrific conditions will restore your faith in humanity."

10.Icarus

Netflix

"It covers the state-sponsored doping program for Russian athletes. The elaborate urine swap plan during the 2014 Winter Games was fascinating. It also shows the dangers and consequences of releasing private Russian secrets to the world."

11.The Staircase

Netflix

"The Staircase' had me obsessed from start to finish! From moment to moment I flip-flopped between being convinced of the husband's guilt, to being convinced the prosecution and law enforcement concocted a narrative in pursuits of a conviction by ANY means necessary. And so many twists and turns in between! It's an eye opener for those still believing the judicial system is always fair and just."

12.The Imposter

Film4 Productions

"It literally plays out like a fictional thriller and what actually happened is so insane that if they proposed it as a movie plot, it would be shot down for being unrealistic. That’s how insane it is! 10/10 for anyone who likes true crime/thriller."

15.Tower

16.How to Survive a Plague

Public Square Films / Ninety Thousand Words

"It’s about the early part of the AIDS epidemic. It is amazing what the people featured accomplished in the face of scorn and certain death. They educated themselves and advocated for themselves to the point that they were successful in changing how the FDA approves experimental drugs."

18.Born into Brothels

THINKFilm

"It’s an amazing story of a photojournalist who went to photograph the red light district of Kolkata. There she meets the children of the prostitutes and decides to start a program to teach these children photography and how to document their lives. You get to know each kid and their hopes and dreams for the future, and see the amazing photographs they take along the way."

20.Twinsters

Small Package Films / Netflix

"Like a real life, modern day Parent Trap which navigates the world – addressing questions of identity, family, belonging, love, friendship, and collaboration in the digital age. Experience the true story of identical twins, born in South Korea, separated at birth, one raised in France, the other in the US, meeting by chance via YouTube...utterly captivating."

21.The Blue Planet

BBC One

"It's such a interesting and high quality documentary about our oceans, and really brings attention to how complex and absolutely magnificent our marine life is. You get very fascinating footage of really amazing sea creatures. Also I might add that the narrator David Attenborough is the best."

22.Evil Genius

Netflix

"Evil Genius shook me to my core. I don't usually watch documentaries but everyone kept going on about it online so I decided to turn it on as background noise while I did some chores. Needless to say chores did not get done. I've never been more glued to my television. Once it was over, I was frantically scouring the internet for more info about the story and looking for others who had seen it because I had to talk to SOMEONE."

23.In Defense of Food

PBS

"I definitely recommend In Defense of Food. It covers how hard the world of food and nutrition can be to navigate with all the information that is thrown at us in today’s society, i.e 'eggs are bad for you...now eggs are good for you'. It’s not your typical food and nutrition documentary that tries to sway you to pick up a certain diet like being vegan or paleo (not that there is anything wrong with those diets). I feel like it recommends the best kind of diet which is to 'eat real food, not too much, mostly plants' and enjoy everything in moderation. Go check it out, it’s on Netflix!"

24.The Barkley Marathons: The Race That Eats Its Young

Barkley Movie LLC

“The Barkley Marathons will inspire you to get out into nature and push yourself into reaching a goal that feels so far away. The runners can compete in a 'fun run' of 60 miles or do the full 100 miles of trail running. The quirky race starts with the creator of the race lighting a cigarette and can start at any time during the day or night. They call it 'the race that eats its young' for a reason. Highly recommended."

25.Planet Earth

BBC One

"It's an obvious one but the original Planet Earth was what got me into documentaries in the first place and it made a huge impact on my life,. Icould watch it again and again and I will still always be in awe of the powers of our planet!"

27.The King of Kong: A Fistful of Quarters

Picturehouse

"The King of Kong: A Fistful of Quarters was funny, heartbreaking, and such a crazy nostalgia trip about an average guy trying to break the high score record of Donkey Kong Jr, and his laughably egotistical nemesis Billy Mitchell who achieved arcade gaming fame back in the early 1980s. Did you like Stranger Things for all its '80s glory? You will love King of Kong. Watch the documentary, then read the latest news about Billy Mitchell, it will be so so satisfying."

– Stephanie Derheimer via Facebook

Watch on: iTunes

28.Tickled

A Ticklish Tale

"It is the weirdest documentary by far, it starts off as a reporter learning theres a tickling competition and wants to film it but it takes a bunch of weird, dark turns."

– Becca Dool via Facebook

Watch on: Amazon Prime Video, iTunes

Note: submissions have been edited for length and/or clarity.

Want to be featured in future posts like this? Make sure to follow the BuzzFeed Community on Facebook and Twitter!